Anchoring system of spring to vehicle axle and spring for vehicle axle

ABSTRACT

Anchoring system of spring to vehicle axle and spring for vehicle axle, of the type where, in a co-ordinate representation the spring acts as OX co-ordinate axis and the vehicle axle as OZ co-ordinate axis, and which has two flanges which are rigidly attached to the axle and are joined together by means of screws, which cross the body of the spring which is gripped between the two flanges, according to OZ axis.  
     For application in vehicle suspension.

[0001] In a co-ordinate system the spring is placed as OX axis and the vehicle axle as OZ axis.

[0002] The current system for anchoring the springs to the axle involves fastening the spring by means of clamping plates, tightened with pins or clamps, which surround the axle so that the grip is perpendicular, according to the OY axis.

[0003] This system is made up of an upper clamping plate, a lower one, the clamps and some nuts and washers as well as some other additional plates.

[0004] The number of parts that are used for the anchoring is excessive, which in turn creates logistic problems of storage-assembly, weight and price.

[0005] The spring is fastening by strongly anchoring it on the traction side, so the measurements and tolerances of the spring in the anchoring area, that is, in the flat and wide area of the spring, are important.

[0006] This anchoring gives rise to strong clamping between the spring and the axle, producing a large transmission of stress to the axle through this clamping.

[0007] The system targeted by the invention achieves better anchoring results as the axle receives less tension from the spring and reduces the number and weight of the parts that comprise the anchoring. All of this is due to this system carrying out the grip in a lateral way, according to axis OZ.

[0008] The anchoring system targeted by the invention consists in fastening/tightening the springs by means of a single flange or two side clamping flanges tightened with pins or screws that keep it strongly anchored. These clamping flanges will be attached to the axle, for example, by means of a welding bead.

[0009] The spring is fastened by strongly anchoring it by the sides, therefore, the measurements and tolerances of the sides are important, reducing the importance of the tolerances of the flat area on the traction side, as occurs in the existing springs.

[0010] The spring targeted by the invention is characterised because it has through or blind openings on the sides to fit mechanical means for the side fastening the spring to the vehicle axle.

[0011] In order to understand the object of this invention better, a preferential way of practical execution is shown on the drawings. This is susceptible to accessory changes that take nothing away from its basic aspects.

[0012]FIG. 1 is a diagram of the anchoring system currently used.

[0013]FIG. 2 is a diagram of a practical execution of the anchoring system targeted by the invention.

[0014]FIG. 3 is a blow-up of FIG. 2.

[0015] Below an example of a practical execution of this invention is described. It is not limitative.

[0016] In FIG. 1 a spring (2) to be attached to a axle (1) has been shown, in this case, with square section. This section may be of other types, for example, round, with anchoring system according to OY Cartesian axis.

[0017] This anchoring system comprises:

[0018] Upper clamping plate (3) and lower clamping plate (4) which grip the axle (1) between them.

[0019] Anchoring plate (5) which, together with the upper clamping plate (3) grip the spring (2) between them.

[0020] Clamps (6) with nuts (7) to grip the whole unit.

[0021] With this anchoring system the transmission of stress between the spring and the axle is important as both upper and lower sides of the spring are attached to the axle through the clamping.

[0022] In the system targeted by the invention much fewer parts are used, so the unit is not as heavy, not as complicated and more economical, managing to reduce the stress on the axle.

[0023] In order to achieve this it has an anchoring system according to the OZ Cartesian axis, that is, with lateral anchoring on the spring (2), where the OZ axis is the longitudinal axis of the vehicle axle (1).

[0024] There is at least one flange (8), which is rigidly attached to the axle (1) and is attached by side screwdown (9) to the spring (2).

[0025] Preferentially there will be two flanges (8) in this system, which are tightened, one on each side, to the spring (2) by means of at least two pins or screws (9) and secure between them a support plate (10) between the spring (2) and the axle (1) between them. It will be seen that the pins/screws (9) cross the body of the spring (2).

[0026] Both the springs (8) and the support plate (10) have a lower surface (s) combined with the shape of the axle (1).

[0027] One of the flanges (8) or both may have an extension (not shown), which extends between spring (2) and axle (1) and carries out support functions for the support plate (10).

[0028] Preferentially the flanges (8) will be welded to the axle (1), but part of the object of the invention is that they be attached to the axle (1) by other rigid attachment means, for example, by extending each flange (8) around the axle (1) and screwing the lower ends together, that is, clamping each flange (8) to the axle (1).

[0029] Part of the object of the invention is that it should be the support plate (10) which is secured to the axle (1), attaching the flange(s) (8) to this support plate (10), as this case would be no more than a realisation of the flange(s) (8) with an extension, which acts as support.

[0030] The two flanges (8) and the support plate (10) forming one single part is also part of the object of the Patent. 

1.- Anchoring system of spring to vehicle axle and spring for vehicle axle, of the kind where, in a representation of co-ordinates, the spring acts as OX co-ordinate axis and the vehicle axle OZ co-ordinate axis, characterised because it has at least one flange which is attached rigidly to the axle and is attached laterally to the spring according to OZ co-ordinate axis. 2.- Anchoring system of spring to vehicle axle, according to previous claim, characterised because it has two flanges, which are rigidly attached to the axle and which are joined together by means of screws that cross the body of the spring, which is gripped between the two flanges. 3.- Anchoring system of spring to vehicle axle, according to previous claims, characterised because it is comprised of a support plate placed between the spring and the axle and secured between the two flanges. 4.- Anchoring system of spring to vehicle axle, according to first claim, characterised because at least one of the flanges has an extension, which extends by way of support between the spring and the axle. 5.- Spring for vehicle axle, according to first claim, characterised because it has through or blind openings on the sides to fit mechanical means for the side fastening of the spring to the vehicle axle. 